package com.woniuxy.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.lang.reflect.Method;

/*
 * 开启redis缓存，设置key的生产策略。主要用于注解情况下，默认使用方法的全限定名作为key    自动生成key
 */
@EnableCaching
@Configuration
public class RedisConfiguration extends CachingConfigurerSupport{
    /*
     * key的生成策略
     */
    @Override
    public KeyGenerator keyGenerator() {
        // TODO Auto-generated method stub
        return new KeyGenerator() {
            /*
             * 参数1：要操作的目标对象
             * 参数2：要操作的方法
             * 参数3：执行方法时的参数
             * GoodsSeraviceImpl.findByid(id)
             * com.woniuxy.mall100.service.impl.GoodsServiceImpl.findById.1
             * com.woniuxy.mall100.service.impl.GoodsServiceImpl.findById.2
             */
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sBuilder = new StringBuilder();
                sBuilder.append(target.getClass().getName());
                sBuilder.append(".");
                sBuilder.append(method.getName());    //生成key
                for(Object object:params){
                    sBuilder.append(".");
                    sBuilder.append(object.toString());
                }
                return sBuilder.toString();
            }
        };
    }
    /**
     * redisTemplate相关配置
     * @param factory
     * @return
     */
    @Bean
    @SuppressWarnings("all")
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate<String, Object> template  = new RedisTemplate<String, Object>();
        //设置工厂
        template.setConnectionFactory(factory);
        //使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值
        //（默认使用JDK的序列化方式）
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer =
                new Jackson2JsonRedisSerializer<>(Object.class);
        //创建对象映射
        ObjectMapper mapper = new ObjectMapper();
        //指定要序列化的域，field,get和set,以及修饰符范围，ANY是都有包括private和public
        mapper.setVisibility(PropertyAccessor.ALL,JsonAutoDetect.Visibility.ANY);
        //指定序列化输入的类型，类必须是非final修饰的，final修饰的类，比如String,Integer
        //等会抛出异常
        mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        //
        jackson2JsonRedisSerializer.setObjectMapper(mapper);
        //字符串序列化器
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        //key采用String的序列化方式
        template.setKeySerializer(stringRedisSerializer);
        //hash的key也采用String的方式
        template.setHashKeySerializer(stringRedisSerializer);
        //value采用jackson的方式
        template.setValueSerializer(jackson2JsonRedisSerializer);
        //hash的value也采用Jackson
        template.setHashValueSerializer(jackson2JsonRedisSerializer);

        template.afterPropertiesSet();
        return template;
    }
}